New Zealand jiu-jitsu athlete Jason Lee, 27, who is not competing in the Games, alleges two highway patrol cops in full military police uniform forced him at gunpoint to withdraw £465 from two cash machines.

According to reports, two officers have been arrested.

Gun-toting thugs also robbed Australian Paralympic sailor Liesl Tesch and team official Sarah Ross of their bikes while they were cycling in a Rio park last month.

Between January and April of this year, there were 1,715 homicides in the city, a 15 per cent increase on the same period last year.

Murders are causing further headaches for Olympic chiefs with bodies dumped in the heavily-polluted sailing and windsurfing venue of Guanabara Bay.

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Disgusting floating debris pictured in Guanabara Bay

EFE

A man helps clean the Meirti river that flows into Guanabara Bay, where the sailing competitions will be held during the upcoming Rio Games

Lalo de Almeida / The New York Times / Redux / eyevine

A turned over vehicle and garbage next to a canal in the Pica-Pau slum which flows into the Iraja river, which empties into Guanabara Bay,

Fisherman Jose Rubens told how he watched children at the fly-blown Roquete Pinto favela on the bay’s rubbish-strewn shoreline haul a dismembered woman’s body from the waves.

Spanish women’s sailing team coach Nigel Cochrane labelled it “disgusting’” and said the team were very concerned about it.

AP:Associated Press

A discarded sofa is pictured among the rubbish scattered on the shore of Guanabara Bay

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Workers attempt to clean the filthy sewage of the official Olympic venue

Authorities have used ecoboats and barriers to gather rubbish flowing into Guanabara but last year the effort was interrupted after money dried up and workers went unpaid for five months.

The government and International Olympic Committee insist they are only using the cleanest sections of the bay for competitions and that the risk to sailors and wind-surfers is minimal.

But nothing typifies the false promises and sheer ineptitude of the authorities here more than these stinking effluent—filled waters.

When Rio successfully bid for the Games in 2009, it promised it would treat 80 per cent of the sewage pumped into the bay, nicknamed the “city’s latrine”.

Yet authorities here concede they now manage to treat just 48 per cent of the raw sewage from the city’s 12 million population.

Lalo de Almeida / The New York Times / Redux / eyevine

A tangle of illegal water pipes at the Pica-Pau slum in Rio de Janeiro

Lalo de Almeida / The New York Times / Redux / eyevine

Olympic sailing teams training in Guanabara Bay in Rio de Janeiro

Sewage has also become an unwanted feature of the Olympic Village digs where organisers were forced to launch a massive operation to fix a deluge of plumbing and electricity faults. This week an open sewer flowed just 50 metres from the new temporary homes.

The Australians and Argentinians reported that some of their rooms were unusable.

A Kenyan wrote: “Please fix my toilet” on a notice board there — while the Belarusians posted photos of dirty windows and blocked drains on their official page.

Swedish athletes are said to have left the complex in disgust.

An emergency squad of 600 plumbers and electricians has been drafted in to repair the shambles.

Team GB has its own workmen on speed-dial.

Meanwhile in teeming, traffic-clogged Rio, feverish last-minute building work is still continuing at

Olympic venues as next Friday’s opening ceremony fast approaches.

Arriving at the supposedly gleaming new international airport terminal on Monday evening, The Sun witnessed members of Team GB’s entourage dodging workmen in shorts and flip-flops as they used drills on the incomplete customs area and arrivals hall.

The world’s top four golfers did not make it that far.

An open sewer flowed just 50 metres from the new temporary homes

Northern Ireland’s Rory McIlroy, Aussie Jason Day and Americans Jordan Spieth and Dustin Johnson have dropped out of the first Olympic golf tournament since 1904 over fears of the mosquito-borne Zika virus.

The infectious disease has been linked to microcephaly in babies, a condition in which the brain does not develop properly, resulting in a head smaller than normal.

Wimbledon finalist Milos Raonic has also pulled out of the Games over health concerns. While the winter months and the change in weather here have seen a sharp fall in Zika cases, the virus is continuing to spread.

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Children are pictured playing near the human remains

A nurse in the Maré favela slum said she was treating around six new cases of the virus in pregnant women every week.

With the array of problems, there is little wonder many here seem less than excited by the Games.

Journalist Helena Chagas is former communications minister to suspended Brazilian president Dilma Rousseff, who is facing an impeachment trial for breaking budget laws.

Helena said: “There is not a shred of enthusiasm among the population for the Olympics.

“Most people feel the same as they did before the 2014 World Cup — they think it’s a waste of time, energy and money, and resources would be better spent on health and education.” Last month even the state governor of Rio, Francisco Dornelles, admitted that the Games could be a “huge flop”.

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The body parts were found metres away from the Olympic volleyball arena

Brazil’s economy is expected to shrink by about four per cent this year as a result of weak commodity prices, low demand from China and political paralysis following President Rousseff’s suspension.